Winders and rewinders for paper machines



April 13, 1965 GREDING 3,178,125

WINDERS AND REWINDERS FOR PAPER MACHINES Original Filed March 8, 1962 4 Sheets-Sheet 1 INVENTOR. BOB EFT GEEDlNG ATTOP/VEK A ril 13, 1965 R. GREDXNG 3,178,125

WINDERS AND REWINDERS FOR PAPER MACHINES Original Filed March 8, 1962 4 Sheets-Sheet 2 INVENTOR.

EOE EET GEEDiNG April 13, 1965 R. GREDING 3,178,125

WINDERS AND REWINDERS FOR PAPER MACHINES Original Filed March 8. 1962 4 Sheets-Sheet 5 U R G M mm VD r me ,T 2 fi m G 1. a m L i an i m 8 April 13, 1965 R. GREDING 3,173,125

WI NDERS AND REWINDERS FOR PAPER MACHINES Original Filed March 8, 1962 4 Sheets-Sheet 4 INVENTOR. ROBERT G'EEDI N G A aPA/E United States Patent 3,178,125 WENDERS AND REWINDERS FOR PAPER MACHINES Robert Greding, Beaconsfield, Quebec, Canada, assignor to Dominion Engineering Works, Limited Original application Mar. 8, 1962, Ser. No. 178,393, now Patent No. 3,167,373, dated Oct. 22, 1963. Divided and this application Dec. 11, 1952, Ser. No. 243,786

3 tCiaims. (Cl. 242-66) This application is a division of my application Serial No. 178,393, filed March 8, 1962, now Patent No. 3,107,873.

This invention relates to new and improved winders and rewinders for paper machines and more particularly to winders and rewinders having an ejector mechanism which will eject rolls of all sizes from winders or rewinders, from a fully wound roll down to an empty core shaft.

A winder, or more specifically a slitter-winder, is positioned at the dry end of a paper machine after the calender and reel, and comprises slitters and windup stand in one single unit. its function is to rewind the paper which has been wound by the reel and which contains breaks and rough edges, and at the same time to slit the paper into the required widths. The two drums, upon which the core shaft rests, are driving drums and, therefore, turn the core shaft by surface contact, which, therefore, maintains a constant paper winding speed.

A rewinder is identical to a winder, except that it is usually much narrower. A rewinder usually operates in a finishing room, and is used for rewinding the rolls which have been slit into comparatively narrow widths on the winder and slitting them again into very narrow widths. It is also used for rewinding rolls which have been damaged on the way to the finishing room, and for many other miscellaneous jobs.

The ejector mechanism, which is the subject of this invention, comprises linked arms which move in unison to eject rolls of all sizes, by pushing on the core shaft journals of small-rolls, or by pushing large-rolls with a large-roll ejector.

The principal object of the invention is to provide a new and improved winder or rewinder for a paper machine or the like, which will eject rolls of paper, or other material, of any size from a fully wound roll down to an empty core shaft.

Another object is to provide means for gently lowering a core shaft between the drums when loading a core shaft onto the winder.

A further object is to provide means for ejecting a core shaft after a bad start or for other reasons.

Another object is to provide a device of the character set forth which is more simple and economical than prior devices and which employs only one actuating mechanism.

Another object is to provide a device of the character set forth wherein only one control is required for all movements.

Another object is to provide a device of the character set forth which effectively utilizes the full range of the winder, by making it possible to wind rolls of any size without delay in the winding operation, thus allowing unrestricted choice of roll diameter and permitting the salvage of paper.

Other objects and advantages of the invention will be apparent from the following desciiption taken in con nection with the accompanying drawings wherein the preferred form has been given by way of illustration only.

ice

Conventional methods of ejecting rolls from winders or rewinders are capable only of ejecting rolls from a fully wound roll down to a certain minimum roll size. Below this minimum size the rolls must be removed by hand or crane or by means of a separate ejector for smallrolls and core shafts.

The disadvantages of such conventional methods include the fact that they call for excessively strenuous effort by the machine operators, are time consuming and, in the case of the third method mentioned, require extra equipment.

Referring to the drawings:

FIG. 1 is a side elevation of the preferred form of the invention on a winder device;

FIG. 2 is a front elevation of the apparatus shown in FIG. 1;

FIGS. 3 to 6 are side elevations of modified forms of the invention; and

FIG. 7 is a sectional view taken on line 77 of FIG. 5.

Referring more particularly to the drawings wherein similar reference characters designate corresponding parts throughout, FIGS. 3 and 4 show several roll sizes, superimposed for simplicity in illustration, from an empty core shaft a, to small-roll b, to intermediate roll c, to fully wound roll d.

In the arrangement shown in FIGS. 1 to 4, the largeroll ejector 1 is positioned on arms 2 which pivot about fulcrum points 3 and are actuated by fluid cylinders 4. Large-roll ejector 1 moves in an are around rear drum 5.

The small roll ejector arms 7 pivot about the axis of the front drum 6.

Large-roll ejector arms 2 and small-roll ejector arms '7 are linked together with tie rods 8, forcing both ejector arms to move in unison.

When actuated, large-roll ejector 1 ejects rolls from the fully wound size roll d down to the intermediate size roll 0, by pushing against the roll along its full width. Rolls between intermediate size roll c down to the empty core shaft a are not touched by the largeroll ejector l, but are ejected by means of the small-roll ejector arms 7 which push against the ends of core shaft a," outside the roll end faces.

A roll is lifted from its winding position between the drums 5 and 6 using the axis of free wheeling front drum 6 as a fulcrum point and starts rolling oif the winder as soon as its centre of gravity moves over the centre line of front drum 6.

Both ejectors 1 and 7 are actuated by the same device, fiuid cylinders 4, and move in unison through tie rods 3, which are in compression during the ejection movement. This makes it possible to use one simple control device for the entire ejection system.

Small roll ejector arms 7 may also be used to gently lower core shaft a between drums 5 and 6 when loading the winder, as follows.

Core shaft a is rolled against the small roll ejector arms 7, which are in maximum eject position. Small-roll ejector arms 7 are then lowered into their at rest positions, thus gently lowering core shaft a between drums 5 and 6 and preventing any damage.

FIGS. 3 to 6 show alternative executions of the invention.

In the execution shown in FIG. 3, the large-roll ejector arms 2a are pivoted about the axis of rear drum 5, and the small-roll ejector arms 7a are pivoted about the axis of front drum 6. Tie rods 8 are mounted between extensions 9 from large-roll ejector arms 2a and extensions 10 from small-roll ejector arms 7a such that, they are in tension during the ejection movement.

arms 7a such that, in a manner similar to the execution shown in FIG. 5, they are in'tension during the ejection movement. Gear pinions 4a are positioned in engaging contact with gear segments 9a and supply the actuating torque.

In the execution shown in FIG. 5, large-roll ejector arms 20 and small-roll ejector arms 75 are' pivoted about the axes of rear drum 5 and front drum 6 respectively. Gear segments 91; extend from large-roll ejector arms 2c and gear segments 10a extend from small-roll ejector arms '71), with gear pinions 4a positioned in en aging contact to supply actuating torque simultaneously to gear segments 9b and 10a.

FIG. 7 is a section on 77 of FIG. 5 and shows in detail, the engaging contact between gear segments 9b and 19a and gear pinions 4a.

In the execution shown in FIG. 6, large-roll ejector arms 2d and small-roll ejector arms 70 are pivoted about the axes of rear drum 5 and front drum 6 respectively. Chain sprockets are fixed to the ejector arms 2:! and 7c, coaxial with the axes of the drums and are mechanically linked by chain loops 8a, driven by sprockets 411.

From the foregoing, it will be seen that I have provided new and improved means for obtaining all of the objects and advantages of the invention.

I claim: I

1. In a winder for paper machines including a base frame and a pair of drums for supporting and driving rolls of paper by surface contact, said pair of drums suitably journalled on said base frame, means for ejecting large-rolls and small-rolls, said means including a largeroll ejector and large-roll ejector arms pivotally mounted coaxial with the journals of one of said pair of drums, said large-roll ejector arms having operating portions extending on the side of the mounting pivots, remote from said large-roll ejector arms, and small-roll ejector arms pivotally mounted coaxial with the journals of the other drum of said pair of drums, said small-roll ejector arms having operating portions extending on the side of the mounting pivots, remote from said small-roll ejector arms, and

i means for actuating simultaneously said large-roll ejector arms and said small-roll ejector arms.

2. In a winder for paper machines including a base frame and a pair of drums for supporting and driving rolls of paper by surface contact, said pair of drums suitably journalled on said base frame, means for ejecting large-rolls and small-rolls, said means including a largeroll ejector and large-roll ejector arms pivotally mounted coaxial with the journals of one of said pair of drums, said large-roll ejector arms having gear segments extending substantially on the side of the mounting pivots, remote from said large-roll ejector arms, and small-roll ejector arms pivotally mounted coaxial with the journals of the other drum of said pair of drums, said small-roll ejector arms having operating portions extending on the side of the mounting pivots, remote from said small-roll ejector arms, and means for actuating simultaneously said large-roll ejector arms and said small-roll ejector arms.

3. In a winder for paper machines including a base frame and a pair of drums for supporting and driving rolls of paper by surface contact, said pair of drums suitably journalled on said base frame, means for ejecting large-rolls and small-rolls, said means including a largeroll ejector and large-roll ejector arms pivotally mounted coaxial with the journals of one of said pair of drums, said large-roll ejector arms having gear segments extending substantially on the side of the mounting pivots, remote from said large-roll ejector arms, and small-roll ejector arms pivotally mounted coaxial with the journals of the other drum of said pair of drums, said small-roll ejector arms having operating portions extending on the side of the mounting pivots, remote from said small-roll ejector arms, and means for actuating simultaneously said large-roll ejector arms and said small-roll ejector arms, said means including driving pinions positioned to operatively engage said gear segments, and tie-rods operatively connected between said gear segments and the operating portions of said small-roll ejector arms.

References Cited by the Examiner UNITED STATES PATENTS 1,939,198 12/33 Berry 24266 MERVIN STEIN, Primary Examiner. DONALD W. PARKER, Examiner. 

1. IN A WINDER FOR PAPER MACHINES INCLUDING A BASE FRAME AND A PAIR OF DRUMS FOR SUPPORTING AND DRIVING ROLLS OF PAPER BY SURFACE CONTACT, SAID PAIR OF DRUMS SUITABLY JOURNALLED ON SAID BASE FRAME, MEANS FOR EJECTING LARGE-ROLLS AND SMALL-ROLLS, SAID MEANS INCLUDING A LARGEROLL EJECTOR AND LARGE-ROLL EJECTOR ARMS PIVOTALLY MOUNTED COAXIAL WITH THE JOURNALS OF ONE OF SAID PAIR OF DRUMS, SAID LARGE-ROLL EJECTOR AMRS HAVING OPERATING PORTIONS EXTENDING ON THE SIDE OF THE MOUNTING PIVOTS, REMOTE FROM SAID LARGE-ROLL EJECTOR ARMS, AND SMALL-ROLL EJECTOR ARMS PIVOTALLY MOUNTED COAXIAL WITH THE JOURNALS OF THE OTHER DRUM OF SAID PAIR OF DRUMS, SAID SMALL-ROLL EJECTOR ARMS HAVING OPERATING PORTIONS EXTENDING ON THE SIDE OF THE MOUNTING PIVOTS, REMOTE FROM SAID SMALL-ROLL EJECTOR ARMS, AND MEANS FOR ACTUATING SIMULTANEOUSLY SAID LARGE-ROLL EJECTOR ARMS AND SAID SMALL-ROLL EJECTOR ARMS. 